Quantum redactiones paginae "Polaris" differant

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Polaris haud omnibus temporibus polum septentrionalem significavit, nam per motum quendam axis Terrae (qui motus ''[[praecessio]]'' vocatur) turbinalem evenit, ut polus caelestis ipse in caelo moveatur. Multis autem saeculis praeteritis, [[Vega]], sideris [[Lyra_(sidus)|Lyrae]] clarissima stella, nova [[stella polaris]] erit.
 
== Bibliographia ==
* Scott G. Engle, Edward F. Guinan, Petr Harmanec, "[http://iopscience.iop.org/article/10.3847/2515-5172/aad2d0/meta Toward Ending the Polaris Parallax Debate: A Precise Distance to Our Nearest Cepheid from ''Gaia'' DR2]" in ''Research Notes of the AAS'' vol. 2 (16 Iulii 2018)
* David G. Turner, V. V. Kovtyukh, Igor Usenko, N. Gorlova, "[https://arxiv.org/abs/1211.6103 The Pulsation Mode of the Cepheid Polaris]" (26 Novembris 2012) apud ''arXiv.org'' pro ''Astrophysical Journal Letters''
 
== Nexus externi ==